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RE: Unicast RPF check! (correction!) posted 03/30/2007
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Can you please post the relevant portions of the configurations ? I would
like to test this. 

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Digital Yemeni
Sent: sexta-feira, 30 de Margo de 2007 10:40
To: Cisco certification
Subject: Unicast RPF check! (correction!)

Please correct the previous email as i mistakenly put R1 where it should be
R2 that has the "ip verify unicast reverse-path" config!


Hi group!

I got strange behavior and hope someone can clarify it for me.
I have the following simple topology:

R1-----------------------------------------R2--------------------------SW1
10.10.10.1              10.10.10.2    192.168.1.2         192.168.1.1

R1 is connected to R2 via Frame-Relay
R2 is connected to SW1

R2 frame-relay interface has RPF check as "ip verify unicast reverse-path "

When R1 pings SW1 interface (192.168.1.1) i get RPF failure! R2 debug shows
the 192.168.1.1 IP comes from the frame-relay interface and thus drop the
traffic as spoofed IP!

Can anyone explain what's going on?


--
Best Regards!
Digital, CCIE# to be assigned by Cisco when it collects enough $$ out of me!
:p

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